Submission #1009328

#	Time	Username	Problem	Language	Result	Execution time	Memory
1009328		Cookie	September (APIO24_september)	C++17	100 / 100	100 ms	17900 KiB

september

#include<bits/stdc++.h>
#include<fstream>
//#pragma GCC optimize("O3")
//#pragma GCC target("avx2")
using namespace std;
#define sz(a) (int)a.size()
#define ALL(v) v.begin(), v.end()
#define ALLR(v) v.rbegin(), v.rend()
#define ll long long
#define pb push_back
#define forr(i, a, b) for(int i = a; i < b; i++)
#define dorr(i, a, b) for(int i = a; i >= b; i--)
#define ld long double
#define vt vector
#include<fstream>
#define fi first
#define se second
#define pll pair<ll, ll>
#define pii pair<int, int>
#define mpp make_pair
const ld PI = 3.14159265359, prec = 1e-9;;
//using u128 = __uint128_t;
const int dx[4] = {1, 0, -1, 0};
const int dy[4] = {0, -1, 0, 1};
const ll mod = 1e9 + 7, pr = 31;
const int mxn = 2e5 + 5, mxd = 250 * 250, sq = 100, mxv = 5e4 + 1, mxq = 2e6 + 5, T = 1000;
//const int base = (1 <<18);
const ll inf = 2e9 + 5, neg = -69420, inf2 = 1e14;
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());

#include <vector>

#include <cassert>
#include <cstdio>

//#include "september.h"

#include <vector>
int n, m;
bool vis[mxn + 1];
vt<int>adj[mxn + 1];
int cnt = 0;
void dfs(int s){
    cnt += m; vis[s] = 1;
    for(auto i: adj[s]){
        if(!vis[i]){
            dfs(i);
        }
    }
}
int solve(int N, int M, std::vector<int> F, std::vector<std::vector<int>> S) {
    n = N; m = M;
    cnt = 0;
    for(int i = 0; i < N; i++){
        adj[i].clear(); vis[i] = 0;
    }
    for(int i = 1; i < N; i++){
        adj[F[i]].pb(i);
    }
    int ans = 0;
    for(int i = 0; i < N - 1; i++){
        for(int j = 0; j < M; j++){
            if(!vis[S[j][i]])dfs(S[j][i]); 
        }
        cnt -= M;
        if(cnt == 0)ans++;
    }
	return(ans);
}

/*
#include <vector>

void taskcase() {
	int N, M;
	assert(2 == scanf("%d%d", &N, &M));
	
	std::vector<int> F(N);
	F[0] = -1;
	for (int i = 1; i < N; ++i)
  		assert(1 == scanf("%d", &F[i]));
	
	std::vector<std::vector<int>> S(M, std::vector<int>(N - 1));
	for (int i = 0; i < M; ++i)
		for (int j = 0; j < N - 1; ++j)
  			assert(1 == scanf("%d", &S[i][j]));
  	
	printf("%d\n", solve(N, M, F, S));
}

int main() {
	int T;
	assert(1 == scanf("%d", &T));
	while(T--) taskcase();
	return 0;
}
*/

• Subtask 1: 11 / 11
• Subtask 2: 14 / 14
• Subtask 3: 5 / 5
• Subtask 4: 9 / 9
• Subtask 5: 5 / 5
• Subtask 6: 11 / 11
• Subtask 7: 9 / 9
• Subtask 8: 11 / 11
• Subtask 9: 9 / 9
• Subtask 10: 16 / 16